MICROLUBROL Gun Protectant Oil 100% Silicone Oil SAFE for ALL METALS 4oz 100% Silicone Oil - NO petroleum distillates or ANY additives, solvents or propellants. Special low viscosity for better penetration and spreadability. Compatible with all metals, all rubbers and plastics. Will not gum up or gel. Will not evaporate. High water repellency Essentially odorless, tasteless and nontoxic.